Finish Thompson CQC-HD - Manual (Page 8)

WARNING:
Wear proper eye and skin protection such as safety glasses and industrial work gloves. Metal
quick-disconnect fittings can become hot to the touch when disconnecting the hoses after
completion of coolant exchange process.
2. Determine the total cooling system capacity of the vehicle. (Refer to the vehicle’s owners manual for
this information). Fill the fill container with a mixture of new or recycled antifreeze and water equal
to the system capacity. If required, add the correct amount of supplemental cooling additive (SCA)
at this time. This could also be mixed in the fill container.
See HELPFUL HINTS for additional information.
3. Place the coolant fill hose, located in the rear of the unit, completely into the
new coolant container and position the 3-way valve, located on the side of the
unit, to the container fill position (see figure 1). Turn the CQC-HD fill pump on
(the switch is located on the front-left side of the unit), until the proper amount
of coolant is pumped into the CQC-HD fill container. Turn the fill pump off and
turn the 3-way valve back to the quick-change position. Return the coolant fill
hose to its hose clip.
NOTE: Most engine manufacturers recommend a mixture of 50% antifreeze
and 50% water. Use distilled or de-mineralized water to prevent scale and
mineral build-up.
4. Check the level in the used coolant drum in the rear of the CQC-HD to verify
that it is not too full to hold another coolant change. See page 9 for instruc-
tions on emptying used coolant drum.
5. Pull the warm vehicle into the service area. Set the vehicle’s heater controls to
the highest temperature setting and turn off the heater fan. (This ensures the
exchange of coolant in the heater core)
6. SHUT OFF THE VEHICLE’S ENGINE and open the hood.
7. Verify that the fill valve on the green fill hose and the drain valve on the black
drain hose of the CQC-HD are both in the closed position.
CAUTION:
Immediately clean up any spills. Damage to the vehicle and equipment can
result from the corrosiveness of the coolant.
8. Wheel the CQC-HD to the front of the vehicle and plug the electric cord into a
115-volt, 60 Hz, grounded receptacle. Use a 16-gauge (minimum) grounded
extension cord if necessary. A GFI (Ground Fault Interrupter) circuit is recommended.
Performing A Quick Change
Following these guidelines will perform a quick change on most vehicles. Due to the variety of diesel
and heavy duty cooling system designs, slight variations of this procedure may be necessary.
PREPARE FOR OPERATION:
1. A quick change works best on a warm vehicle. Allow vehicle to run at an idle for several minutes
prior to initiating a quick change.
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6.
Figure 1